Rotary swaging machine



Junezz, 194s. s. SMITH v 2,443,874

ROTARY SWAGING MACHINE Filed Jan'. 8, v1945 im wf@ 5 Patented June 22, 1948 j RQTARY MACHINE.

Application January 8, 19445,Sc1iallNoQ571l7-75 j In Greatritain January L21, 1'944 Y 1 l l. 'Thisinvention has reference `to improvements "in rotaryswaging machines, and relatesto that type of machine in whic'hblows at a great rapidity are imparted to the workpiecein order to reduce through the agency of-.dieafsay rod, tube or wire. The salient Vfeatures of suchI a machine are the rotating spindle mounted in a housing, and an enlarged end to the spindle which has a transverse slot therein at right angles to its axis. This spindle carries a pair of half dies which are each associated with a hammer block, the enlarged end being surrounded by an annular stationary cage which is provided with a plurality of rollers located in a hardened steel track shrunk in a housing surrounding the head of the spindle. The dimensions of the dies and the hammer blocks are so arranged that as the spindle revolves and the blocks pass between each pair of diametrically disposed rollers the dies are forced together and are thus caused to impart repetitive blows to the workpiece.

It is a desideratum in this type of swaging machine that the amount of the throw or outward movement of the dies and the hammer blocks due to centrifugal force is controlled or limited, otherwise unsatisfactory work is produced. Existing devices for this purpose comprise adjustable stops adapted to have contact with the outer end of the hammer blocks, but such stops are subject to wear and tear, do not provide a sufficient abutment surface, `and therefore are not wholly satisfactory for the aforesaid purpose.

The object of the present invention is to pro vide an improved means of controlling and limiting the rapid reciprocating motion of the hammer bloclm in an outward direction due to centrifugal force which means can be accurately adjusted and set according to varying requirements and circumstances.

The invention consists of a rotary swaging machine wherein a transverse slot is formed through each hammer block, said slot being adapted to receive a transversely located adjustable wedge, -a clearance obtaining between a longitudinal edge or edges of the slot and the periphery of the wedge located therein, whereby the reciprocating motions of the hammer block are controlled and limited. The invention further resides in the means of mounting the wedges in the guide chan,- nel within which the reciprocatory motion of the hammer blocks and the forming dies is effected.

The invention will now be described in a preferred form with particular reference to the accompanying drawings, in which:

2. claims. (ci. vs -22) 'Fig `1 is a'flong'itudinal sectional sidefelevation, this View showin-g `the enlarged "head end of `ther-otatingfhollow spindle.

Fig. 2 is lapart sectional endfelevation of Fig. v1 looking on :the left-hand 'sideof that figure.

VIn the drawings ais a-'rhol-low rotatlngfspindle provi'ded `with ani-enlarged `head-. Within ithis enlarged head is secured a channel guideway c which guideway is completed by the front cover plate d which is bolted to the enlarged head b. Mounted within the guideway so that a rapid reciprocal motion may be imparted thereto in the well-known manner of rotary swaging machines through a stationary annulus containing a plurality of rollers 7 is a pair of hammer blocks e and a pair of half dies f through a clearance aperture f1 wherein the workpiece to be swaged down is fed through the hollow spindle a.

The particular feature of the present invention resides in the formation in the hammer blocks of transverse slots e1 of wedge configuration with-` in each of which slots is located a loosely mounted adjustable wedge g. These wedges are associated at their broad ends with screwed set pins g1 rotatably mounted in the cover plate d and locked by nuts h, these nuts forming the means of adjusting and locking the set pins g1 in position within the cover plate d. The outer end of the screwed shank is notched to provide an adjustment means for the set pins in their mounting.

The wedges are partially located in slots c1 which are complementary to and offset from the slots e1 in the hammer blocks and thus afford a location and support for the wedges within the guideway c within which the hammer blocks e and dies f reciprocate,

A pair of slots c2 are provided in the base of the channel guideway c which' slots freely accommodate the inner ends of the wedges g and provide for any required adjustment in the setting of the wedges within their mounting i. e. the Wedges can be set so that a greater or lesser reciprocal motion is permitted to the hammer blocks e, that is, the throw of the hammer blocks due to centrifugal force is controlled or limited thereby.

It is to be appreciated that in order to effect an adjustment of the wedges in the assembly illustrated in the drawings, by screwing up or unscrewing each set pin g1 associated with the butt end of each wedge g, the Wedges which are more or less freely and transversely mounted within the guideway cand within the slots e1 in the hammer blocks e permit of the hammer blocks and the half dies having a greater or lesser reciprocal motion which is determined by the clearance obtaining in the complementary slots c1 and e1 in relation to the upper and lower edges or faces of the wedges g. The adjustably mounted wedges thus provide at rectilinear areas of contact between the wedges and the co-operating slots e1 in the hammer blocks e and the slots c1 within the guideway c thereby producing a re1- atively considerable area of abutment and contact between the reciprocating hammer blocks and the motion determining or limiting Wedges as compared with that which obtains in other known forms of device for effecting, a similar purpose Where only a linear contact obtains.

I claim: 1. In a rotary swaging machine, in combination,` a rotary head having a transverse channel, swaging dies in the channel, hammer blocks in the channel on opposite sides of the dies, each hammer block having one face in engagement ywith its' corresponding die and an opposite face yfor, receiving hammer blows, a recess in each 4 l to the .opposite side of the other corresponding recess, a Wedge extending into -both of each pair of recesses, and means-for adjusting the penetration of each wedge into its recesses to vary the amount of movement of each hammer block REFERENCES CITED rThe following references are of record inthe Vfile of v this patent:

-I- lAUlNTITlilD STATES PATENTS Name Date 3651,- 274 Miller June 7, 1887 773,197 Crawshaw Oct. 25, 1904 1,468,507 McKee i Sept. 18, 1923 2,138106 Klocke Nov. 29, 1938 FOREIGN PATENTS Number Country Date y 20,701 Great Britain lSept 13. 1914 

